What bookdealers really mean. A dictionary by Tom Congalton and Dan Gregory (Between the Covers), with additions from other sources
The paper, often with illustrations and information about the book and author, used as a protective covering over the book; usually referred to as a "dust jacket" or "dj", sometimes called a "dust wrapper". Dust jacket art work is used to promote and sell the book.
Chemise servant à la protection d'un livre relié ou broché.